Also populate the storesCache when importing product only on storevie…

…w(s) level, previously the storesCache was only populated for products imported on global level. This causes problems with the correct url rewrites to be generated.

app/code/Magento/CatalogUrlRewrite/Observer/AfterImportDataObserver.php

@@ -263,6 +263,7 @@ protected function _populateForUrlGeneration($rowData)
         if ($this->isGlobalScope($product->getStoreId())) {
             $this->populateGlobalProduct($product);
         } else {
+            $this->storesCache[$product->getStoreId()] = true;
             $this->addProductToImport($product, $product->getStoreId());
         }
         return $this;